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| | nautilus profile |
 | | The video, in three short chapters, describes nautilus biology and ecology, and features some of the research efforts in which the Waik |
 | | Nautilus swim in a see-saw motion generated by "jet propulsion." They alternately pull water into the mantle cavity within the shell and blow it out the muscular siphon beneath the tentacles. |
 | | But, unlike snails, the nautilus shell is divided into compartments (about four in newly hatched specimens, 30 in mature individuals), and the animal occupies only the outer-most "living chamber." As the nautilus grows, its body moves forward in the enlarged shell and produces a wall to seal off older chambers. |
| waquarium.mic.hawaii.edu /MLP/root/html/MarineLife/Invertebrates/Molluscs/Nautilus.html (1488 words) |
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